Effect of Rice-Carp Coculture on Phytoplankton and Microzooplankton Community Composition in Paddy Water during Different Rice Growth Stages

文献类型： 外文期刊

第一作者： Welde, Geleta Tiko

作者： Welde, Geleta Tiko;Li, Bing;Hou, Yiran;Ayana, Gelana Urgesa;Jia, Rui;Zhu, Jian;Li, Bing;Hou, Yiran;Zhou, Linjun;Jia, Rui;Zhu, Jian

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关键词： rice-carp coculture; rice monoculture; phytoplankton; zooplankton; paddy water

期刊名称：WATER （ 影响因子：3.0； 五年影响因子：3.3 ）

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年卷期： 2024 年 16 卷 19 期

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收录情况： SCI

摘要： Integrated rice-fish farming, an agricultural practice that combines cultivating rice and breeding fish in the same field, has attracted widespread attention. However, there is limited research on how the rice-carp coculture impacts the community structure of phytoplankton and microzooplankton in paddy water. This study employed eDNA metabarcoding sequencing to analyze the composition of phytoplankton and microzooplankton in a rice monoculture system (RM) and a rice-carp coculture system (RF). Following annotation, we identified 9 phyla, 89 families, 275 genera, and 249 species of phytoplankton, along with 20 phyla (or subphyla and classes), 85 families, 222 genera, and 179 species of microzooplankton. The alpha diversity indices revealed significantly higher richness, diversity, and evenness in the RF group compared to the RM group during grain-filling stage. Principal coordinates analysis (PCoA) demonstrated notable differences in the phytoplankton and microzooplankton compositions between the two groups across various rice growth stages. Composition analysis showed that rice-carp coculture increased the relative abundance of dominant phytoplankton phyla such as Bacillariophyta, Chrysophyta, and Euglenophyta while decreasing that of Cryptophyta. In microzooplankton, the coculture resulted in an increased abundance of Intramacronucleata (subphylum) and a decrease in Conoidasida (class). In conclusion, the rice-carp coculture enhances the diversity of plankton, particularly during the grain-filling stage, and simultaneously alters the composition and abundance of dominant plankton species in the paddy water. These findings enhance understanding of the broader impacts of integrated rice-carp farming on agricultural ecosystems, emphasizing alterations in the diversity and composition of aquatic microorganisms

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